Material Properties
Insulation & Sheath Material Properties Related To Fireproof of Cable

Halogen free
AEI TP536 Thermoplastic general purpose HFFR sheathing
Thermoplastic, low smoke, halogen free, flame retardant compound for cable insulation and sheathing

Test	Test method	Unit	Typical value
Physical properties and mechanical properties
Density	BS 2782 Pt. 6 Mtd 620A-D	g/cm3	1.5
Melt Flow Rate (2.16kg at 190°C)	AEI Method	g/10min	11
Tensile strength	IEC 60811-1-1	N/mm²	16
Elongation at break	IEC 60811-1-1	%	160
Tear Strength	BS 6469	N/mm	6.5
Hardness (N)	Shore A	-	90
Hardness (N)	Shore D	-	40
Typical ageing behaviour after 7 days at 100°C
Tensile strength Elongation at break	IEC 60811-1-2 IEC 60811-1-2	% Variation % Variation	+18 -15
Thermo mechanical properties
Hot pressure deformation at 90°C	IEC 60811-3-1	%	25
Cold bend test at -30°C	IEC 60811-1-4	-	pass
Elongation at break at -30°C	IEC 60811-1-4	%	60 (pass)
Fire & smoke properties
Oxygen Index	BS ISO 4589-2	%	35
Temperature Index Corrosivity of gases	BS ISO 4589-3	°C	280
pH	BS EN 50267-2-3	-	4.3
Conductivity Halogen Acid Gas Evolution	BS EN 50267-2-3 IEC 60754-1	µS/cm %	10.7 <0.5
Smoke emission 3m cube test	BS EN 61034-2:2005	-	pass
Electrical properties
Insulation Constant Ki at 20°C	IEC 60502	MΩ.km	5.43
Insulation Constant Ki at 90°C	IEC 60502	MΩ.km	0.057

Extruder
An extruder with an L/D ratio (length/diameter) of 15-24 and an extruder screw with a compression ratio 1.5:1 or less are recommended.
Extruder temperature conditions
It is important that the melt temperature is not allowed to rise above 170°C.
As a guide the following temperature profile is recommended:-

Zone1	Zone2	Zone3	Zone4	Head	Die
120°C	130°C	140°C	150°C	160°C	160°C

This profile will vary slightly depending on extruder type, head design and output.
Screw water temperature:Depends upon screw design, but should be 30-50°C
Recommended screen pack: 50 (mesh apertures per linear inch) or 300 micron
Masterbatches
Addition of approved colour masterbatches, including black, up to a maximum of 1%, has no detrimental effect on the properties.
It is recommended that all masterbatches should be thoroughly dried at 60°C for 8 hours or at 80°C for 4 hours in a de-humidifying drier.
Storage and shelf life
TP536 has an unlimited shelf life. However, the following precautions should be observed:-
• Packaging should remain sealed
• Avoid storage outside and in direct sunlight.

Material Properties Insulation & Sheath Material Properties Related To Fireproof of Cable

Material Properties
Insulation & Sheath Material Properties Related To Fireproof of Cable